/*
 * WPA Supplicant - driver interaction with Linux nl80211/cfg80211
 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"
#include <sys/ioctl.h>
#include <net/if_arp.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include "nl80211_copy.h"
#ifdef CONFIG_CLIENT_MLME
#include <netpacket/packet.h>
#include <linux/if_ether.h>
#include "radiotap.h"
#include "radiotap_iter.h"
#endif /* CONFIG_CLIENT_MLME */

#include "wireless_copy.h"
#include "common.h"
#include "driver.h"
#include "eloop.h"
#include "ieee802_11_defs.h"

#ifndef IFF_LOWER_UP
#define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
#endif
#ifndef IFF_DORMANT
#define IFF_DORMANT    0x20000         /* driver signals dormant       */
#endif

#ifndef IF_OPER_DORMANT
#define IF_OPER_DORMANT 5
#endif
#ifndef IF_OPER_UP
#define IF_OPER_UP 6
#endif


struct wpa_driver_nl80211_data {
        void *ctx;
        int wext_event_sock;
        int ioctl_sock;
        char ifname[IFNAMSIZ + 1];
        int ifindex;
        int if_removed;
        u8 *assoc_req_ies;
        size_t assoc_req_ies_len;
        u8 *assoc_resp_ies;
        size_t assoc_resp_ies_len;
        struct wpa_driver_capa capa;
        int has_capability;
        int we_version_compiled;

        /* for set_auth_alg fallback */
        int use_crypt;
        int auth_alg_fallback;

        int operstate;

        char mlmedev[IFNAMSIZ + 1];

        int scan_complete_events;

        struct nl_handle *nl_handle;
        struct nl_cache *nl_cache;
        struct nl_cb *nl_cb;
        struct genl_family *nl80211;

#ifdef CONFIG_CLIENT_MLME
        int monitor_sock; /* socket for monitor */
        int monitor_ifidx;
#endif /* CONFIG_CLIENT_MLME */
};


static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
                                            void *timeout_ctx);
static int wpa_driver_nl80211_set_mode(void *priv, int mode);
static int wpa_driver_nl80211_flush_pmkid(void *priv);
static int wpa_driver_nl80211_get_range(void *priv);
static void
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);


/* nl80211 code */
static int ack_handler(struct nl_msg *msg, void *arg)
{
        int *err = arg;
        *err = 0;
        return NL_STOP;
}

static int finish_handler(struct nl_msg *msg, void *arg)
{
        int *ret = arg;
        *ret = 0;
        return NL_SKIP;
}

static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
                         void *arg)
{
        int *ret = arg;
        *ret = err->error;
        return NL_SKIP;
}

static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
                              struct nl_msg *msg,
                              int (*valid_handler)(struct nl_msg *, void *),
                              void *valid_data)
{
        struct nl_cb *cb;
        int err = -ENOMEM;

        cb = nl_cb_clone(drv->nl_cb);
        if (!cb)
                goto out;

        err = nl_send_auto_complete(drv->nl_handle, msg);
        if (err < 0)
                goto out;

        err = 1;

        nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
        nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
        nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);

        if (valid_handler)
                nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
                          valid_handler, valid_data);

        while (err > 0)
                nl_recvmsgs(drv->nl_handle, cb);
 out:
        nl_cb_put(cb);
        nlmsg_free(msg);
        return err;
}


struct family_data {
        const char *group;
        int id;
};


static int family_handler(struct nl_msg *msg, void *arg)
{
        struct family_data *res = arg;
        struct nlattr *tb[CTRL_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct nlattr *mcgrp;
        int i;

        nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);
        if (!tb[CTRL_ATTR_MCAST_GROUPS])
                return NL_SKIP;

        nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
                struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
                nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
                          nla_len(mcgrp), NULL);
                if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
                    !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
                    os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
                               res->group,
                               nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
                        continue;
                res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
                break;
        };

        return NL_SKIP;
}


static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
                               const char *family, const char *group)
{
        struct nl_msg *msg;
        int ret = -1;
        struct family_data res = { group, -ENOENT };

        msg = nlmsg_alloc();
        if (!msg)
                return -ENOMEM;
        genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
                    0, 0, CTRL_CMD_GETFAMILY, 0);
        NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);

        ret = send_and_recv_msgs(drv, msg, family_handler, &res);
        msg = NULL;
        if (ret == 0)
                ret = res.id;

nla_put_failure:
        nlmsg_free(msg);
        return ret;
}


static int wpa_driver_nl80211_send_oper_ifla(
        struct wpa_driver_nl80211_data *drv,
        int linkmode, int operstate)
{
        struct {
                struct nlmsghdr hdr;
                struct ifinfomsg ifinfo;
                char opts[16];
        } req;
        struct rtattr *rta;
        static int nl_seq;
        ssize_t ret;

        os_memset(&req, 0, sizeof(req));

        req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
        req.hdr.nlmsg_type = RTM_SETLINK;
        req.hdr.nlmsg_flags = NLM_F_REQUEST;
        req.hdr.nlmsg_seq = ++nl_seq;
        req.hdr.nlmsg_pid = 0;

        req.ifinfo.ifi_family = AF_UNSPEC;
        req.ifinfo.ifi_type = 0;
        req.ifinfo.ifi_index = drv->ifindex;
        req.ifinfo.ifi_flags = 0;
        req.ifinfo.ifi_change = 0;

        if (linkmode != -1) {
                rta = aliasing_hide_typecast(
                        ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
                        struct rtattr);
                rta->rta_type = IFLA_LINKMODE;
                rta->rta_len = RTA_LENGTH(sizeof(char));
                *((char *) RTA_DATA(rta)) = linkmode;
                req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
                        RTA_LENGTH(sizeof(char));
        }
        if (operstate != -1) {
                rta = (struct rtattr *)
                        ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
                rta->rta_type = IFLA_OPERSTATE;
                rta->rta_len = RTA_LENGTH(sizeof(char));
                *((char *) RTA_DATA(rta)) = operstate;
                req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
                        RTA_LENGTH(sizeof(char));
        }

        wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
                   linkmode, operstate);

        ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
                           "%s (assume operstate is not supported)",
                           strerror(errno));
        }

        return ret < 0 ? -1 : 0;
}


static int wpa_driver_nl80211_set_auth_param(
        struct wpa_driver_nl80211_data *drv, int idx, u32 value)
{
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.param.flags = idx & IW_AUTH_INDEX;
        iwr.u.param.value = value;

        if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
                if (errno != EOPNOTSUPP) {
                        wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
                                   "value 0x%x) failed: %s)",
                                   idx, value, strerror(errno));
                }
                ret = errno == EOPNOTSUPP ? -2 : -1;
        }

        return ret;
}


static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);

        if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
                perror("ioctl[SIOCGIWAP]");
                ret = -1;
        }
        os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);

        return ret;
}


static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
        if (bssid)
                os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
        else
                os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);

        if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
                perror("ioctl[SIOCSIWAP]");
                ret = -1;
        }

        return ret;
}


static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.essid.pointer = (caddr_t) ssid;
        iwr.u.essid.length = 32;

        if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
                perror("ioctl[SIOCGIWESSID]");
                ret = -1;
        } else {
                ret = iwr.u.essid.length;
                if (ret > 32)
                        ret = 32;
                /* Some drivers include nul termination in the SSID, so let's
                 * remove it here before further processing. WE-21 changes this
                 * to explicitly require the length _not_ to include nul
                 * termination. */
                if (ret > 0 && ssid[ret - 1] == '\0' &&
                    drv->we_version_compiled < 21)
                        ret--;
        }

        return ret;
}


static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
                                       size_t ssid_len)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;
        char buf[33];

        if (ssid_len > 32)
                return -1;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
        iwr.u.essid.flags = (ssid_len != 0);
        os_memset(buf, 0, sizeof(buf));
        os_memcpy(buf, ssid, ssid_len);
        iwr.u.essid.pointer = (caddr_t) buf;
        if (drv->we_version_compiled < 21) {
                /* For historic reasons, set SSID length to include one extra
                 * character, C string nul termination, even though SSID is
                 * really an octet string that should not be presented as a C
                 * string. Some Linux drivers decrement the length by one and
                 * can thus end up missing the last octet of the SSID if the
                 * length is not incremented here. WE-21 changes this to
                 * explicitly require the length _not_ to include nul
                 * termination. */
                if (ssid_len)
                        ssid_len++;
        }
        iwr.u.essid.length = ssid_len;

        if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
                perror("ioctl[SIOCSIWESSID]");
                ret = -1;
        }

        return ret;
}


static int wpa_driver_nl80211_set_freq(void *priv, int freq)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.freq.m = freq * 100000;
        iwr.u.freq.e = 1;

        if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
                perror("ioctl[SIOCSIWFREQ]");
                ret = -1;
        }

        return ret;
}


static void
wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
{
        union wpa_event_data data;

        wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
                   custom);

        os_memset(&data, 0, sizeof(data));
        /* Host AP driver */
        if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
                data.michael_mic_failure.unicast =
                        os_strstr(custom, " unicast ") != NULL;
                /* TODO: parse parameters(?) */
                wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
        } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
                char *spos;
                int bytes;

                spos = custom + 17;

                bytes = strspn(spos, "0123456789abcdefABCDEF");
                if (!bytes || (bytes & 1))
                        return;
                bytes /= 2;

                data.assoc_info.req_ies = os_malloc(bytes);
                if (data.assoc_info.req_ies == NULL)
                        return;

                data.assoc_info.req_ies_len = bytes;
                hexstr2bin(spos, data.assoc_info.req_ies, bytes);

                spos += bytes * 2;

                data.assoc_info.resp_ies = NULL;
                data.assoc_info.resp_ies_len = 0;

                if (os_strncmp(spos, " RespIEs=", 9) == 0) {
                        spos += 9;

                        bytes = strspn(spos, "0123456789abcdefABCDEF");
                        if (!bytes || (bytes & 1))
                                goto done;
                        bytes /= 2;

                        data.assoc_info.resp_ies = os_malloc(bytes);
                        if (data.assoc_info.resp_ies == NULL)
                                goto done;

                        data.assoc_info.resp_ies_len = bytes;
                        hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
                }

                wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);

        done:
                os_free(data.assoc_info.resp_ies);
                os_free(data.assoc_info.req_ies);
#ifdef CONFIG_PEERKEY
        } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
                if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
                        wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
                                   "STKSTART.request '%s'", custom + 17);
                        return;
                }
                wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
#endif /* CONFIG_PEERKEY */
        }
}


static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
        void *ctx, const char *ev, size_t len)
{
        const struct iw_michaelmicfailure *mic;
        union wpa_event_data data;

        if (len < sizeof(*mic))
                return -1;

        mic = (const struct iw_michaelmicfailure *) ev;

        wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
                   "flags=0x%x src_addr=" MACSTR, mic->flags,
                   MAC2STR(mic->src_addr.sa_data));

        os_memset(&data, 0, sizeof(data));
        data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
        wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);

        return 0;
}


static int wpa_driver_nl80211_event_wireless_pmkidcand(
        struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
{
        const struct iw_pmkid_cand *cand;
        union wpa_event_data data;
        const u8 *addr;

        if (len < sizeof(*cand))
                return -1;

        cand = (const struct iw_pmkid_cand *) ev;
        addr = (const u8 *) cand->bssid.sa_data;

        wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
                   "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
                   cand->index, MAC2STR(addr));

        os_memset(&data, 0, sizeof(data));
        os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
        data.pmkid_candidate.index = cand->index;
        data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
        wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);

        return 0;
}


static int wpa_driver_nl80211_event_wireless_assocreqie(
        struct wpa_driver_nl80211_data *drv, const char *ev, int len)
{
        if (len < 0)
                return -1;

        wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
                    len);
        os_free(drv->assoc_req_ies);
        drv->assoc_req_ies = os_malloc(len);
        if (drv->assoc_req_ies == NULL) {
                drv->assoc_req_ies_len = 0;
                return -1;
        }
        os_memcpy(drv->assoc_req_ies, ev, len);
        drv->assoc_req_ies_len = len;

        return 0;
}


static int wpa_driver_nl80211_event_wireless_assocrespie(
        struct wpa_driver_nl80211_data *drv, const char *ev, int len)
{
        if (len < 0)
                return -1;

        wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
                    len);
        os_free(drv->assoc_resp_ies);
        drv->assoc_resp_ies = os_malloc(len);
        if (drv->assoc_resp_ies == NULL) {
                drv->assoc_resp_ies_len = 0;
                return -1;
        }
        os_memcpy(drv->assoc_resp_ies, ev, len);
        drv->assoc_resp_ies_len = len;

        return 0;
}


static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
{
        union wpa_event_data data;

        if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
                return;

        os_memset(&data, 0, sizeof(data));
        if (drv->assoc_req_ies) {
                data.assoc_info.req_ies = drv->assoc_req_ies;
                drv->assoc_req_ies = NULL;
                data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
        }
        if (drv->assoc_resp_ies) {
                data.assoc_info.resp_ies = drv->assoc_resp_ies;
                drv->assoc_resp_ies = NULL;
                data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
        }

        wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);

        os_free(data.assoc_info.req_ies);
        os_free(data.assoc_info.resp_ies);
}


static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
                                           void *ctx, char *data, int len)
{
        struct iw_event iwe_buf, *iwe = &iwe_buf;
        char *pos, *end, *custom, *buf;

        pos = data;
        end = data + len;

        while (pos + IW_EV_LCP_LEN <= end) {
                /* Event data may be unaligned, so make a local, aligned copy
                 * before processing. */
                os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
                wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
                           iwe->cmd, iwe->len);
                if (iwe->len <= IW_EV_LCP_LEN)
                        return;

                custom = pos + IW_EV_POINT_LEN;
                if (drv->we_version_compiled > 18 &&
                    (iwe->cmd == IWEVMICHAELMICFAILURE ||
                     iwe->cmd == IWEVCUSTOM ||
                     iwe->cmd == IWEVASSOCREQIE ||
                     iwe->cmd == IWEVASSOCRESPIE ||
                     iwe->cmd == IWEVPMKIDCAND)) {
                        /* WE-19 removed the pointer from struct iw_point */
                        char *dpos = (char *) &iwe_buf.u.data.length;
                        int dlen = dpos - (char *) &iwe_buf;
                        os_memcpy(dpos, pos + IW_EV_LCP_LEN,
                                  sizeof(struct iw_event) - dlen);
                } else {
                        os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
                        custom += IW_EV_POINT_OFF;
                }

                switch (iwe->cmd) {
                case SIOCGIWAP:
                        wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
                                   MACSTR,
                                   MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
                        if (is_zero_ether_addr(
                                    (const u8 *) iwe->u.ap_addr.sa_data) ||
                            os_memcmp(iwe->u.ap_addr.sa_data,
                                      "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
                            0) {
                                os_free(drv->assoc_req_ies);
                                drv->assoc_req_ies = NULL;
                                os_free(drv->assoc_resp_ies);
                                drv->assoc_resp_ies = NULL;
                                wpa_supplicant_event(ctx, EVENT_DISASSOC,
                                                     NULL);
                        
                        } else {
                                wpa_driver_nl80211_event_assoc_ies(drv);
                                wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
                        }
                        break;
                case IWEVMICHAELMICFAILURE:
                        wpa_driver_nl80211_event_wireless_michaelmicfailure(
                                ctx, custom, iwe->u.data.length);
                        break;
                case IWEVCUSTOM:
                        if (custom + iwe->u.data.length > end)
                                return;
                        buf = os_malloc(iwe->u.data.length + 1);
                        if (buf == NULL)
                                return;
                        os_memcpy(buf, custom, iwe->u.data.length);
                        buf[iwe->u.data.length] = '\0';
                        wpa_driver_nl80211_event_wireless_custom(ctx, buf);
                        os_free(buf);
                        break;
                case IWEVASSOCREQIE:
                        wpa_driver_nl80211_event_wireless_assocreqie(
                                drv, custom, iwe->u.data.length);
                        break;
                case IWEVASSOCRESPIE:
                        wpa_driver_nl80211_event_wireless_assocrespie(
                                drv, custom, iwe->u.data.length);
                        break;
                case IWEVPMKIDCAND:
                        wpa_driver_nl80211_event_wireless_pmkidcand(
                                drv, custom, iwe->u.data.length);
                        break;
                }

                pos += iwe->len;
        }
}


static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
                                          void *ctx, char *buf, size_t len,
                                          int del)
{
        union wpa_event_data event;

        os_memset(&event, 0, sizeof(event));
        if (len > sizeof(event.interface_status.ifname))
                len = sizeof(event.interface_status.ifname) - 1;
        os_memcpy(event.interface_status.ifname, buf, len);
        event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
                EVENT_INTERFACE_ADDED;

        wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
                   del ? "DEL" : "NEW",
                   event.interface_status.ifname,
                   del ? "removed" : "added");

        if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
                if (del)
                        drv->if_removed = 1;
                else
                        drv->if_removed = 0;
        }

        wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
}


static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
                                         struct nlmsghdr *h)
{
        struct ifinfomsg *ifi;
        int attrlen, _nlmsg_len, rta_len;
        struct rtattr *attr;

        ifi = NLMSG_DATA(h);

        _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));

        attrlen = h->nlmsg_len - _nlmsg_len;
        if (attrlen < 0)
                return 0;

        attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);

        rta_len = RTA_ALIGN(sizeof(struct rtattr));
        while (RTA_OK(attr, attrlen)) {
                if (attr->rta_type == IFLA_IFNAME) {
                        if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
                            == 0)
                                return 1;
                        else
                                break;
                }
                attr = RTA_NEXT(attr, attrlen);
        }

        return 0;
}


static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
                                          int ifindex, struct nlmsghdr *h)
{
        if (drv->ifindex == ifindex)
                return 1;

        if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
                drv->ifindex = if_nametoindex(drv->ifname);
                wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
                           "interface");
                wpa_driver_nl80211_finish_drv_init(drv);
                return 1;
        }

        return 0;
}


static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
                                              void *ctx, struct nlmsghdr *h,
                                              size_t len)
{
        struct ifinfomsg *ifi;
        int attrlen, _nlmsg_len, rta_len;
        struct rtattr * attr;

        if (len < sizeof(*ifi))
                return;

        ifi = NLMSG_DATA(h);

        if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
                wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
                           ifi->ifi_index);
                return;
        }

        wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
                   "(%s%s%s%s)",
                   drv->operstate, ifi->ifi_flags,
                   (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
                   (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
                   (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
                   (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
        /*
         * Some drivers send the association event before the operup event--in
         * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
         * fails. This will hit us when wpa_supplicant does not need to do
         * IEEE 802.1X authentication
         */
        if (drv->operstate == 1 &&
            (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
            !(ifi->ifi_flags & IFF_RUNNING))
                wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);

        _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));

        attrlen = h->nlmsg_len - _nlmsg_len;
        if (attrlen < 0)
                return;

        attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);

        rta_len = RTA_ALIGN(sizeof(struct rtattr));
        while (RTA_OK(attr, attrlen)) {
                if (attr->rta_type == IFLA_WIRELESS) {
                        wpa_driver_nl80211_event_wireless(
                                drv, ctx, ((char *) attr) + rta_len,
                                attr->rta_len - rta_len);
                } else if (attr->rta_type == IFLA_IFNAME) {
                        wpa_driver_nl80211_event_link(
                                drv, ctx,
                                ((char *) attr) + rta_len,
                                attr->rta_len - rta_len, 0);
                }
                attr = RTA_NEXT(attr, attrlen);
        }
}


static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
                                              void *ctx, struct nlmsghdr *h,
                                              size_t len)
{
        struct ifinfomsg *ifi;
        int attrlen, _nlmsg_len, rta_len;
        struct rtattr * attr;

        if (len < sizeof(*ifi))
                return;

        ifi = NLMSG_DATA(h);

        _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));

        attrlen = h->nlmsg_len - _nlmsg_len;
        if (attrlen < 0)
                return;

        attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);

        rta_len = RTA_ALIGN(sizeof(struct rtattr));
        while (RTA_OK(attr, attrlen)) {
                if (attr->rta_type == IFLA_IFNAME) {
                        wpa_driver_nl80211_event_link(
                                drv, ctx,
                                ((char *) attr) + rta_len,
                                attr->rta_len - rta_len, 1);
                }
                attr = RTA_NEXT(attr, attrlen);
        }
}


static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
                                                  void *sock_ctx)
{
        char buf[8192];
        int left;
        struct sockaddr_nl from;
        socklen_t fromlen;
        struct nlmsghdr *h;
        int max_events = 10;

try_again:
        fromlen = sizeof(from);
        left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
                        (struct sockaddr *) &from, &fromlen);
        if (left < 0) {
                if (errno != EINTR && errno != EAGAIN)
                        perror("recvfrom(netlink)");
                return;
        }

        h = (struct nlmsghdr *) buf;
        while (left >= (int) sizeof(*h)) {
                int len, plen;

                len = h->nlmsg_len;
                plen = len - sizeof(*h);
                if (len > left || plen < 0) {
                        wpa_printf(MSG_DEBUG, "Malformed netlink message: "
                                   "len=%d left=%d plen=%d",
                                   len, left, plen);
                        break;
                }

                switch (h->nlmsg_type) {
                case RTM_NEWLINK:
                        wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
                                                          h, plen);
                        break;
                case RTM_DELLINK:
                        wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
                                                          h, plen);
                        break;
                }

                len = NLMSG_ALIGN(len);
                left -= len;
                h = (struct nlmsghdr *) ((char *) h + len);
        }

        if (left > 0) {
                wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
                           "message", left);
        }

        if (--max_events > 0) {
                /*
                 * Try to receive all events in one eloop call in order to
                 * limit race condition on cases where AssocInfo event, Assoc
                 * event, and EAPOL frames are received more or less at the
                 * same time. We want to process the event messages first
                 * before starting EAPOL processing.
                 */
                goto try_again;
        }
}


static int no_seq_check(struct nl_msg *msg, void *arg)
{
        return NL_OK;
}


static int process_event(struct nl_msg *msg, void *arg)
{
        struct wpa_driver_nl80211_data *drv = arg;
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct nlattr *tb[NL80211_ATTR_MAX + 1];

        nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);

        if (tb[NL80211_ATTR_IFINDEX]) {
                int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
                if (ifindex != drv->ifindex) {
                        wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
                                   " for foreign interface (ifindex %d)",
                                   gnlh->cmd, ifindex);
                        return NL_SKIP;
                }
        }

        switch (gnlh->cmd) {
        case NL80211_CMD_TRIGGER_SCAN:
                wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
                break;
        case NL80211_CMD_NEW_SCAN_RESULTS:
                wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
                drv->scan_complete_events = 1;
                eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
                                     drv->ctx);
                wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
                break;
        case NL80211_CMD_SCAN_ABORTED:
                wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
                /*
                 * Need to indicate that scan results are available in order
                 * not to make wpa_supplicant stop its scanning.
                 */
                eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
                                     drv->ctx);
                wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
                break;
        default:
                wpa_printf(MSG_DEBUG, "nl0211: Ignored unknown event (cmd=%d)",
                           gnlh->cmd);
                break;
        }

        return NL_SKIP;
}


static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
                                             void *sock_ctx)
{
        struct nl_cb *cb;
        struct wpa_driver_nl80211_data *drv = eloop_ctx;

        wpa_printf(MSG_DEBUG, "nl80211: Event message available");

        cb = nl_cb_clone(drv->nl_cb);
        if (!cb)
                return;
        nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
        nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
        nl_recvmsgs(drv->nl_handle, cb);
        nl_cb_put(cb);
}


static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
                                              const char *ifname, int *flags)
{
        struct ifreq ifr;

        os_memset(&ifr, 0, sizeof(ifr));
        os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
        if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
                perror("ioctl[SIOCGIFFLAGS]");
                return -1;
        }
        *flags = ifr.ifr_flags & 0xffff;
        return 0;
}


/**
 * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 * @drv: driver_nl80211 private data
 * @flags: Pointer to returned flags value
 * Returns: 0 on success, -1 on failure
 */
static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
                                          int *flags)
{
        return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
}


static int wpa_driver_nl80211_set_ifflags_ifname(
        struct wpa_driver_nl80211_data *drv,
        const char *ifname, int flags)
{
        struct ifreq ifr;

        os_memset(&ifr, 0, sizeof(ifr));
        os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
        ifr.ifr_flags = flags & 0xffff;
        if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
                perror("SIOCSIFFLAGS");
                return -1;
        }
        return 0;
}


/**
 * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 * @drv: driver_nl80211 private data
 * @flags: New value for flags
 * Returns: 0 on success, -1 on failure
 */
static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
                                          int flags)
{
        return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
}


/**
 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 * @priv: driver_nl80211 private data
 * @alpha2_arg: country to which to switch to
 * Returns: 0 on success, -1 on failure
 *
 * This asks nl80211 to set the regulatory domain for given
 * country ISO / IEC alpha2.
 */
static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
{
        struct wpa_driver_nl80211_data *drv = priv;
        char alpha2[3];
        struct nl_msg *msg;

        msg = nlmsg_alloc();
        if (!msg)
                goto nla_put_failure;

        alpha2[0] = alpha2_arg[0];
        alpha2[1] = alpha2_arg[1];
        alpha2[2] = '\0';

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                    0, NL80211_CMD_REQ_SET_REG, 0);

        NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
        if (send_and_recv_msgs(drv, msg, NULL, NULL))
                return -EINVAL;
        return 0;
nla_put_failure:
        return -EINVAL;
}


static int wpa_driver_nl80211_set_probe_req_ie(void *priv, const u8 *ies,
                                               size_t ies_len)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct nl_msg *msg;
        int ret = -1;

        msg = nlmsg_alloc();
        if (!msg)
                return -ENOMEM;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
                    NL80211_CMD_SET_MGMT_EXTRA_IE, 0);

        NLA_PUT_U8(msg, NL80211_ATTR_MGMT_SUBTYPE, 4 /* ProbeReq */);
        if (ies)
                NLA_PUT(msg, NL80211_ATTR_IE, ies_len, ies);

        ret = 0;

        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        return ret;

nla_put_failure:
        return -ENOBUFS;
}


#ifdef CONFIG_CLIENT_MLME

static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
                           int drop_unencrypted, int userspace_mlme)
{
#ifdef NL80211_CMD_SET_VIF
        struct nl_msg *msg;
        int ret = -1;

        msg = nlmsg_alloc();
        if (!msg)
                return -ENOMEM;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
                    NL80211_CMD_SET_VIF, 0);

        if (drop_unencrypted >= 0)
                NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
                           drop_unencrypted);
        if (userspace_mlme >= 0)
                NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
                           userspace_mlme);

        ret = 0;

        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        return ret;

nla_put_failure:
        return -ENOBUFS;
#else /* NL80211_CMD_SET_VIF */
        return -1;
#endif /* NL80211_CMD_SET_VIF */
}


static int wpa_driver_nl80211_set_userspace_mlme(
        struct wpa_driver_nl80211_data *drv, int enabled)
{
        return nl80211_set_vif(drv, -1, enabled);
}


static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
                                 int ifidx)
{
        struct nl_msg *msg;

        msg = nlmsg_alloc();
        if (!msg)
                goto nla_put_failure;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                    0, NL80211_CMD_DEL_INTERFACE, 0);
        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
        if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
                return;
nla_put_failure:
        wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
}


static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
                                const char *ifname, enum nl80211_iftype iftype)
{
        struct nl_msg *msg, *flags = NULL;
        int ifidx, err;
        int ret = -ENOBUFS;

        msg = nlmsg_alloc();
        if (!msg)
                return -1;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                    0, NL80211_CMD_NEW_INTERFACE, 0);
        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
        NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
        NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);

        if (iftype == NL80211_IFTYPE_MONITOR) {
                flags = nlmsg_alloc();
                if (!flags)
                        goto nla_put_failure;

                NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);

                err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);

                nlmsg_free(flags);

                if (err)
                        goto nla_put_failure;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
        nla_put_failure:
                wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d",
                           ret);
                return ret;
        }

        ifidx = if_nametoindex(ifname);
        if (ifidx <= 0)
                return -1;

        return ifidx;
}


static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
{
        struct wpa_driver_nl80211_data *drv = eloop_ctx;
        int len;
        unsigned char buf[3000];
        struct ieee80211_radiotap_iterator iter;
        int ret;
        int injected = 0, failed = 0, rxflags = 0;
        struct ieee80211_rx_status rx_status;

        len = recv(sock, buf, sizeof(buf), 0);
        if (len < 0) {
                perror("recv");
                return;
        }

        if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
                wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
                           "frame");
                return;
        }

        os_memset(&rx_status, 0, sizeof(rx_status));

        while (1) {
                ret = ieee80211_radiotap_iterator_next(&iter);
                if (ret == -ENOENT)
                        break;
                if (ret) {
                        wpa_printf(MSG_DEBUG, "nl80211: received invalid "
                                   "radiotap frame (%d)", ret);
                        return;
                }
                switch (iter.this_arg_index) {
                case IEEE80211_RADIOTAP_FLAGS:
                        if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
                                len -= 4;
                        break;
                case IEEE80211_RADIOTAP_RX_FLAGS:
                        rxflags = 1;
                        break;
                case IEEE80211_RADIOTAP_TX_FLAGS:
                        injected = 1;
                        failed = le_to_host16((*(u16 *) iter.this_arg)) &
                                IEEE80211_RADIOTAP_F_TX_FAIL;
                        break;
                case IEEE80211_RADIOTAP_DATA_RETRIES:
                        break;
                case IEEE80211_RADIOTAP_CHANNEL:
                        /* TODO convert from freq/flags to channel number
                         * rx_status.channel = XXX;
                        */
                        break;
                case IEEE80211_RADIOTAP_RATE:
                        break;
                case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
                        rx_status.ssi = *iter.this_arg;
                        break;
                }
        }

        if (rxflags && injected)
                return;

        if (!injected) {
                wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
                                      len - iter.max_length, &rx_status);
        } else if (failed) {
                /* TX failure callback */
        } else {
                /* TX success (ACK) callback */
        }
}


static int wpa_driver_nl80211_create_monitor_interface(
        struct wpa_driver_nl80211_data *drv)
{
        char buf[IFNAMSIZ];
        struct sockaddr_ll ll;
        int optval, flags;
        socklen_t optlen;

        os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
        buf[IFNAMSIZ - 1] = '\0';

        drv->monitor_ifidx =
                nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);

        if (drv->monitor_ifidx < 0)
                return -1;

        if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
            wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
            0) {
                wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
                           "UP", buf);
                goto error;
        }

        os_memset(&ll, 0, sizeof(ll));
        ll.sll_family = AF_PACKET;
        ll.sll_ifindex = drv->monitor_ifidx;
        drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
        if (drv->monitor_sock < 0) {
                perror("socket[PF_PACKET,SOCK_RAW]");
                goto error;
        }

        if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
                 sizeof(ll)) < 0) {
                perror("monitor socket bind");
                goto error;
        }

        optlen = sizeof(optval);
        optval = 20;
        if (setsockopt
            (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
                perror("Failed to set socket priority");
                goto error;
        }

        if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
                                     drv, NULL)) {
                wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
                           "read socket");
                goto error;
        }

        return 0;

 error:
        nl80211_remove_iface(drv, drv->monitor_ifidx);
        return -1;
}

#endif /* CONFIG_CLIENT_MLME */


/**
 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
 * @ctx: context to be used when calling wpa_supplicant functions,
 * e.g., wpa_supplicant_event()
 * @ifname: interface name, e.g., wlan0
 * Returns: Pointer to private data, %NULL on failure
 */
static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
{
        int s, ret;
        struct sockaddr_nl local;
        struct wpa_driver_nl80211_data *drv;

        drv = os_zalloc(sizeof(*drv));
        if (drv == NULL)
                return NULL;
        drv->ctx = ctx;
        os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));

        drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
        if (drv->nl_cb == NULL) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
                           "callbacks");
                goto err1;
        }

        drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
        if (drv->nl_handle == NULL) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
                           "callbacks");
                goto err2;
        }

        if (genl_connect(drv->nl_handle)) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
                           "netlink");
                goto err3;
        }

        drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
        if (drv->nl_cache == NULL) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
                           "netlink cache");
                goto err3;
        }

        drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
        if (drv->nl80211 == NULL) {
                wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
                           "found");
                goto err4;
        }

        ret = nl_get_multicast_id(drv, "nl80211", "scan");
        if (ret >= 0)
                ret = nl_socket_add_membership(drv->nl_handle, ret);
        if (ret < 0) {
                wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
                           "membership for scan events: %d (%s)",
                           ret, strerror(-ret));
                goto err4;
        }
        eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
                                 wpa_driver_nl80211_event_receive, drv, ctx);

        drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
        if (drv->ioctl_sock < 0) {
                perror("socket(PF_INET,SOCK_DGRAM)");
                goto err5;
        }

        s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
        if (s < 0) {
                perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
                goto err6;
        }

        os_memset(&local, 0, sizeof(local));
        local.nl_family = AF_NETLINK;
        local.nl_groups = RTMGRP_LINK;
        if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
                perror("bind(netlink)");
                close(s);
                goto err6;
        }

        eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
                                 ctx);
        drv->wext_event_sock = s;

        wpa_driver_nl80211_finish_drv_init(drv);

        return drv;

err6:
        close(drv->ioctl_sock);
err5:
        genl_family_put(drv->nl80211);
err4:
        nl_cache_free(drv->nl_cache);
err3:
        nl_handle_destroy(drv->nl_handle);
err2:
        nl_cb_put(drv->nl_cb);
err1:
        os_free(drv);
        return NULL;
}


static void
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
{
        int flags;

        drv->ifindex = if_nametoindex(drv->ifname);

        if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
                printf("Could not configure driver to use managed mode\n");
        }

        if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
                printf("Could not get interface '%s' flags\n", drv->ifname);
        else if (!(flags & IFF_UP)) {
                if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
                        printf("Could not set interface '%s' UP\n",
                               drv->ifname);
                }
        }

        /*
         * Make sure that the driver does not have any obsolete PMKID entries.
         */
        wpa_driver_nl80211_flush_pmkid(drv);

        wpa_driver_nl80211_get_range(drv);

        wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
}


/**
 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
 *
 * Shut down driver interface and processing of driver events. Free
 * private data buffer if one was allocated in wpa_driver_nl80211_init().
 */
static void wpa_driver_nl80211_deinit(void *priv)
{
        struct wpa_driver_nl80211_data *drv = priv;
        int flags;

#ifdef CONFIG_CLIENT_MLME
        if (drv->monitor_sock >= 0) {
                eloop_unregister_read_sock(drv->monitor_sock);
                close(drv->monitor_sock);
        }
        if (drv->monitor_ifidx > 0)
                nl80211_remove_iface(drv, drv->monitor_ifidx);
        if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
                wpa_driver_nl80211_set_userspace_mlme(drv, 0);
#endif /* CONFIG_CLIENT_MLME */

        eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);

        /*
         * Clear possibly configured driver parameters in order to make it
         * easier to use the driver after wpa_supplicant has been terminated.
         */
        (void) wpa_driver_nl80211_set_bssid(drv,
                                         (u8 *) "\x00\x00\x00\x00\x00\x00");

        wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);

        eloop_unregister_read_sock(drv->wext_event_sock);

        if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
                (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);

        close(drv->wext_event_sock);
        close(drv->ioctl_sock);
        os_free(drv->assoc_req_ies);
        os_free(drv->assoc_resp_ies);

        eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
        genl_family_put(drv->nl80211);
        nl_cache_free(drv->nl_cache);
        nl_handle_destroy(drv->nl_handle);
        nl_cb_put(drv->nl_cb);

        os_free(drv);
}


/**
 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
 * @eloop_ctx: Unused
 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
 *
 * This function can be used as registered timeout when starting a scan to
 * generate a scan completed event if the driver does not report this.
 */
static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
        wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
        wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
}


/**
 * wpa_driver_nl80211_scan - Request the driver to initiate scan
 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
 * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
 *        all SSIDs (either active scan with broadcast SSID or passive
 *        scan
 * @ssid_len: Length of the SSID
 * Returns: 0 on success, -1 on failure
 */
static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
{
        struct wpa_driver_nl80211_data *drv = priv;
        int ret = 0, timeout;
        struct nl_msg *msg, *ssids;

        msg = nlmsg_alloc();
        ssids = nlmsg_alloc();
        if (!msg || !ssids) {
                nlmsg_free(msg);
                nlmsg_free(ssids);
                return -1;
        }

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
                    NL80211_CMD_TRIGGER_SCAN, 0);

        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

        if (ssid && ssid_len) {
                /* Request an active scan for a specific SSID */
                NLA_PUT(ssids, 1, ssid_len, ssid);
        } else {
                /* Request an active scan for wildcard SSID */
                NLA_PUT(ssids, 1, 0, "");
        }
        nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
                           "(%s)", ret, strerror(-ret));
                goto nla_put_failure;
        }

        /* Not all drivers generate "scan completed" wireless event, so try to
         * read results after a timeout. */
        timeout = 10;
        if (drv->scan_complete_events) {
                /*
                 * The driver seems to deliver SIOCGIWSCAN events to notify
                 * when scan is complete, so use longer timeout to avoid race
                 * conditions with scanning and following association request.
                 */
                timeout = 30;
        }
        wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
                   "seconds", ret, timeout);
        eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
        eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
                               drv, drv->ctx);

nla_put_failure:
        nlmsg_free(ssids);
        nlmsg_free(msg);
        return ret;
}


static int bss_info_handler(struct nl_msg *msg, void *arg)
{
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct nlattr *bss[NL80211_BSS_MAX + 1];
        static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
                [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
                [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
                [NL80211_BSS_TSF] = { .type = NLA_U64 },
                [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
                [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
                [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
                [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
                [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
        };
        struct wpa_scan_results *res = arg;
        struct wpa_scan_res **tmp;
        struct wpa_scan_res *r;
        const u8 *ie;
        size_t ie_len;

        nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);
        if (!tb[NL80211_ATTR_BSS])
                return NL_SKIP;
        if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
                             bss_policy))
                return NL_SKIP;
        if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
                ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
                ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
        } else {
                ie = NULL;
                ie_len = 0;
        }

        r = os_zalloc(sizeof(*r) + ie_len);
        if (r == NULL)
                return NL_SKIP;
        if (bss[NL80211_BSS_BSSID])
                os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
                          ETH_ALEN);
        if (bss[NL80211_BSS_FREQUENCY])
                r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
        if (bss[NL80211_BSS_BEACON_INTERVAL])
                r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
        if (bss[NL80211_BSS_CAPABILITY])
                r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
        if (bss[NL80211_BSS_SIGNAL_UNSPEC])
                r->qual = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
        if (bss[NL80211_BSS_SIGNAL_MBM])
                r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
        if (bss[NL80211_BSS_TSF])
                r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
        r->ie_len = ie_len;
        if (ie)
                os_memcpy(r + 1, ie, ie_len);

        tmp = os_realloc(res->res,
                         (res->num + 1) * sizeof(struct wpa_scan_res *));
        if (tmp == NULL) {
                os_free(r);
                return NL_SKIP;
        }
        tmp[res->num++] = r;
        res->res = tmp;

        return NL_SKIP;
}


/**
 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
 * Returns: Scan results on success, -1 on failure
 */
static struct wpa_scan_results *
wpa_driver_nl80211_get_scan_results(void *priv)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct nl_msg *msg;
        struct wpa_scan_results *res;
        int ret;

        res = os_zalloc(sizeof(*res));
        if (res == NULL)
                return 0;
        msg = nlmsg_alloc();
        if (!msg)
                goto nla_put_failure;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
                    NL80211_CMD_GET_SCAN, 0);
        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

        ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
        msg = NULL;
        if (ret == 0) {
                wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
                           (unsigned long) res->num);
                return res;
        }
        wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
                   "(%s)", ret, strerror(-ret));
nla_put_failure:
        nlmsg_free(msg);
        wpa_scan_results_free(res);
        return NULL;
}


static int wpa_driver_nl80211_get_range(void *priv)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct iw_range *range;
        struct iwreq iwr;
        int minlen;
        size_t buflen;

        /*
         * Use larger buffer than struct iw_range in order to allow the
         * structure to grow in the future.
         */
        buflen = sizeof(struct iw_range) + 500;
        range = os_zalloc(buflen);
        if (range == NULL)
                return -1;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.data.pointer = (caddr_t) range;
        iwr.u.data.length = buflen;

        minlen = ((char *) &range->enc_capa) - (char *) range +
                sizeof(range->enc_capa);

        if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
                perror("ioctl[SIOCGIWRANGE]");
                os_free(range);
                return -1;
        } else if (iwr.u.data.length >= minlen &&
                   range->we_version_compiled >= 18) {
                wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
                           "WE(source)=%d enc_capa=0x%x",
                           range->we_version_compiled,
                           range->we_version_source,
                           range->enc_capa);
                drv->has_capability = 1;
                drv->we_version_compiled = range->we_version_compiled;
                if (range->enc_capa & IW_ENC_CAPA_WPA) {
                        drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
                                WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
                }
                if (range->enc_capa & IW_ENC_CAPA_WPA2) {
                        drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
                                WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
                }
                drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
                        WPA_DRIVER_CAPA_ENC_WEP104;
                if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
                        drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
                if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
                        drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
                drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
                        WPA_DRIVER_AUTH_SHARED |
                        WPA_DRIVER_AUTH_LEAP;
                wpa_printf(MSG_DEBUG, "  capabilities: key_mgmt 0x%x enc 0x%x",
                           drv->capa.key_mgmt, drv->capa.enc);
        } else {
                wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
                           "assuming WPA is not supported");
        }

        os_free(range);
        return 0;
}


static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
{
        struct wpa_driver_nl80211_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);

        return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
                                              enabled);
}


static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
                                      const u8 *addr, int key_idx,
                                      int set_tx, const u8 *seq,
                                      size_t seq_len,
                                      const u8 *key, size_t key_len)
{
        struct wpa_driver_nl80211_data *drv = priv;
        int err;
        struct nl_msg *msg;

        wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
                   "seq_len=%lu key_len=%lu",
                   __func__, alg, addr, key_idx, set_tx,
                   (unsigned long) seq_len, (unsigned long) key_len);

        msg = nlmsg_alloc();
        if (msg == NULL)
                return -1;

        if (alg == WPA_ALG_NONE) {
                genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
                            NL80211_CMD_DEL_KEY, 0);
        } else {
                genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
                            NL80211_CMD_NEW_KEY, 0);
                NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
                switch (alg) {
                case WPA_ALG_WEP:
                        if (key_len == 5)
                                NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
                                            0x000FAC01);
                        else
                                NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
                                            0x000FAC05);
                        break;
                case WPA_ALG_TKIP:
                        NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
                        break;
                case WPA_ALG_CCMP:
                        NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
                        break;
#ifdef CONFIG_IEEE80211W
                case WPA_ALG_IGTK:
                        NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
                        break;
#endif /* CONFIG_IEEE80211W */
                default:
                        nlmsg_free(msg);
                        return -1;
                }
        }

        if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
        {
                wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
                NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
        }
        NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

        err = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (err) {
                wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
                return -1;
        }

        if (set_tx && alg != WPA_ALG_NONE) {
                msg = nlmsg_alloc();
                if (msg == NULL)
                        return -1;

                genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                            0, NL80211_CMD_SET_KEY, 0);
                NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
                NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
                NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);

                err = send_and_recv_msgs(drv, msg, NULL, NULL);
                if (err) {
                        wpa_printf(MSG_DEBUG, "nl80211: set default key "
                                   "failed; err=%d", err);
                        return -1;
                }
        }

        return 0;

nla_put_failure:
        return -ENOBUFS;
}


static int wpa_driver_nl80211_set_countermeasures(void *priv,
                                               int enabled)
{
        struct wpa_driver_nl80211_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        return wpa_driver_nl80211_set_auth_param(drv,
                                              IW_AUTH_TKIP_COUNTERMEASURES,
                                              enabled);
}


static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
                                                int enabled)
{
        struct wpa_driver_nl80211_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        drv->use_crypt = enabled;
        return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
                                              enabled);
}


static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
                                const u8 *addr, int cmd, int reason_code)
{
        struct iwreq iwr;
        struct iw_mlme mlme;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        os_memset(&mlme, 0, sizeof(mlme));
        mlme.cmd = cmd;
        mlme.reason_code = reason_code;
        mlme.addr.sa_family = ARPHRD_ETHER;
        os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
        iwr.u.data.pointer = (caddr_t) &mlme;
        iwr.u.data.length = sizeof(mlme);

        if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
                perror("ioctl[SIOCSIWMLME]");
                ret = -1;
        }

        return ret;
}


static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
                                          int reason_code)
{
        struct wpa_driver_nl80211_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
}


static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
                                        int reason_code)
{
        struct wpa_driver_nl80211_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
        return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
                                    reason_code);
}


static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
                                      size_t ie_len)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        iwr.u.data.pointer = (caddr_t) ie;
        iwr.u.data.length = ie_len;

        if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
                perror("ioctl[SIOCSIWGENIE]");
                ret = -1;
        }

        return ret;
}


static int wpa_driver_nl80211_cipher2wext(int cipher)
{
        switch (cipher) {
        case CIPHER_NONE:
                return IW_AUTH_CIPHER_NONE;
        case CIPHER_WEP40:
                return IW_AUTH_CIPHER_WEP40;
        case CIPHER_TKIP:
                return IW_AUTH_CIPHER_TKIP;
        case CIPHER_CCMP:
                return IW_AUTH_CIPHER_CCMP;
        case CIPHER_WEP104:
                return IW_AUTH_CIPHER_WEP104;
        default:
                return 0;
        }
}


static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
{
        switch (keymgmt) {
        case KEY_MGMT_802_1X:
        case KEY_MGMT_802_1X_NO_WPA:
                return IW_AUTH_KEY_MGMT_802_1X;
        case KEY_MGMT_PSK:
                return IW_AUTH_KEY_MGMT_PSK;
        default:
                return 0;
        }
}


static int
wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
                                  struct wpa_driver_associate_params *params)
{
        struct iwreq iwr;
        int ret = 0;

        wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
                   "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        /* Just changing mode, not actual keys */
        iwr.u.encoding.flags = 0;
        iwr.u.encoding.pointer = (caddr_t) NULL;
        iwr.u.encoding.length = 0;

        /*
         * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
         * different things. Here they are used to indicate Open System vs.
         * Shared Key authentication algorithm. However, some drivers may use
         * them to select between open/restricted WEP encrypted (open = allow
         * both unencrypted and encrypted frames; restricted = only allow
         * encrypted frames).
         */

        if (!drv->use_crypt) {
                iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
        } else {
                if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
                        iwr.u.encoding.flags |= IW_ENCODE_OPEN;
                if (params->auth_alg & AUTH_ALG_SHARED_KEY)
                        iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
        }

        if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
                perror("ioctl[SIOCSIWENCODE]");
                ret = -1;
        }

        return ret;
}


static int wpa_driver_nl80211_associate(
        void *priv, struct wpa_driver_associate_params *params)
{
        struct wpa_driver_nl80211_data *drv = priv;
        int ret = 0;
        int allow_unencrypted_eapol;
        int value;

        wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);

        /*
         * If the driver did not support SIOCSIWAUTH, fallback to
         * SIOCSIWENCODE here.
         */
        if (drv->auth_alg_fallback &&
            wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
                ret = -1;

        if (!params->bssid &&
            wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
                ret = -1;

        /* TODO: should consider getting wpa version and cipher/key_mgmt suites
         * from configuration, not from here, where only the selected suite is
         * available */
        if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
            < 0)
                ret = -1;
        if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
                value = IW_AUTH_WPA_VERSION_DISABLED;
        else if (params->wpa_ie[0] == WLAN_EID_RSN)
                value = IW_AUTH_WPA_VERSION_WPA2;
        else
                value = IW_AUTH_WPA_VERSION_WPA;
        if (wpa_driver_nl80211_set_auth_param(drv,
                                           IW_AUTH_WPA_VERSION, value) < 0)
                ret = -1;
        value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
        if (wpa_driver_nl80211_set_auth_param(drv,
                                           IW_AUTH_CIPHER_PAIRWISE, value) < 0)
                ret = -1;
        value = wpa_driver_nl80211_cipher2wext(params->group_suite);
        if (wpa_driver_nl80211_set_auth_param(drv,
                                           IW_AUTH_CIPHER_GROUP, value) < 0)
                ret = -1;
        value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
        if (wpa_driver_nl80211_set_auth_param(drv,
                                           IW_AUTH_KEY_MGMT, value) < 0)
                ret = -1;
        value = params->key_mgmt_suite != KEY_MGMT_NONE ||
                params->pairwise_suite != CIPHER_NONE ||
                params->group_suite != CIPHER_NONE ||
                params->wpa_ie_len;
        if (wpa_driver_nl80211_set_auth_param(drv,
                                           IW_AUTH_PRIVACY_INVOKED, value) < 0)
                ret = -1;

        /* Allow unencrypted EAPOL messages even if pairwise keys are set when
         * not using WPA. IEEE 802.1X specifies that these frames are not
         * encrypted, but WPA encrypts them when pairwise keys are in use. */
        if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
            params->key_mgmt_suite == KEY_MGMT_PSK)
                allow_unencrypted_eapol = 0;
        else
                allow_unencrypted_eapol = 1;
        
        if (wpa_driver_nl80211_set_auth_param(drv,
                                           IW_AUTH_RX_UNENCRYPTED_EAPOL,
                                           allow_unencrypted_eapol) < 0)
                ret = -1;
        if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
                ret = -1;
        if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
                ret = -1;
        if (params->bssid &&
            wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
                ret = -1;

        return ret;
}


static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
{
        struct wpa_driver_nl80211_data *drv = priv;
        int algs = 0, res;

        if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
                algs |= IW_AUTH_ALG_OPEN_SYSTEM;
        if (auth_alg & AUTH_ALG_SHARED_KEY)
                algs |= IW_AUTH_ALG_SHARED_KEY;
        if (auth_alg & AUTH_ALG_LEAP)
                algs |= IW_AUTH_ALG_LEAP;
        if (algs == 0) {
                /* at least one algorithm should be set */
                algs = IW_AUTH_ALG_OPEN_SYSTEM;
        }

        res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
                                             algs);
        drv->auth_alg_fallback = res == -2;
        return res;
}


/**
 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
 * Returns: 0 on success, -1 on failure
 */
static int wpa_driver_nl80211_set_mode(void *priv, int mode)
{
        struct wpa_driver_nl80211_data *drv = priv;
        int ret = -1, flags;
        struct nl_msg *msg;

        msg = nlmsg_alloc();
        if (!msg)
                return -1;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                    0, NL80211_CMD_SET_INTERFACE, 0);
        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
        NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
                    mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (!ret)
                return 0;
        else
                goto try_again;

nla_put_failure:
        wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
                   ret, strerror(-ret));
        return -1;

try_again:
        /* mac80211 doesn't allow mode changes while the device is up, so
         * take the device down, try to set the mode again, and bring the
         * device back up.
         */
        if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
                (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);

                /* Try to set the mode again while the interface is down */
                msg = nlmsg_alloc();
                if (!msg)
                        return -1;

                genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                            0, NL80211_CMD_SET_INTERFACE, 0);
                NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
                NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
                            mode ? NL80211_IFTYPE_ADHOC :
                            NL80211_IFTYPE_STATION);
                ret = send_and_recv_msgs(drv, msg, NULL, NULL);
                if (ret) {
                        wpa_printf(MSG_ERROR, "Failed to set interface %s "
                                   "mode(try_again): %d (%s)",
                                   drv->ifname, ret, strerror(-ret));
                }

                /* Ignore return value of get_ifflags to ensure that the device
                 * is always up like it was before this function was called.
                 */
                (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
                (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
        }

        return ret;
}


static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
                                 u32 cmd, const u8 *bssid, const u8 *pmkid)
{
        struct iwreq iwr;
        struct iw_pmksa pmksa;
        int ret = 0;

        os_memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
        os_memset(&pmksa, 0, sizeof(pmksa));
        pmksa.cmd = cmd;
        pmksa.bssid.sa_family = ARPHRD_ETHER;
        if (bssid)
                os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
        if (pmkid)
                os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
        iwr.u.data.pointer = (caddr_t) &pmksa;
        iwr.u.data.length = sizeof(pmksa);

        if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
                if (errno != EOPNOTSUPP)
                        perror("ioctl[SIOCSIWPMKSA]");
                ret = -1;
        }

        return ret;
}


static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
                                     const u8 *pmkid)
{
        struct wpa_driver_nl80211_data *drv = priv;
        return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
}


static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
                                         const u8 *pmkid)
{
        struct wpa_driver_nl80211_data *drv = priv;
        return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
}


static int wpa_driver_nl80211_flush_pmkid(void *priv)
{
        struct wpa_driver_nl80211_data *drv = priv;
        return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
}


static int wpa_driver_nl80211_get_capa(void *priv,
                                       struct wpa_driver_capa *capa)
{
        struct wpa_driver_nl80211_data *drv = priv;
        if (!drv->has_capability)
                return -1;
        os_memcpy(capa, &drv->capa, sizeof(*capa));
        return 0;
}


static int wpa_driver_nl80211_set_operstate(void *priv, int state)
{
        struct wpa_driver_nl80211_data *drv = priv;

        wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
                   __func__, drv->operstate, state, state ? "UP" : "DORMANT");
        drv->operstate = state;
        return wpa_driver_nl80211_send_oper_ifla(
                drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
}


#ifdef CONFIG_CLIENT_MLME
static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
{
        if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
                           "MLME");
                return -1;
        }
        if (wpa_driver_nl80211_create_monitor_interface(drv)) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
                           "interface");
                return -1;
        }
        return 0;
}
#endif /* CONFIG_CLIENT_MLME */


static int wpa_driver_nl80211_set_param(void *priv, const char *param)
{
#ifdef CONFIG_CLIENT_MLME
        struct wpa_driver_nl80211_data *drv = priv;

        if (param == NULL)
                return 0;

        wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);

        if (os_strstr(param, "use_mlme=1")) {
                wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
                drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;

                if (wpa_driver_nl80211_open_mlme(drv))
                        return -1;
        }
#endif /* CONFIG_CLIENT_MLME */

        return 0;
}


#ifdef CONFIG_CLIENT_MLME

struct phy_info_arg {
        u16 *num_modes;
        struct wpa_hw_modes *modes;
};


static int phy_info_handler(struct nl_msg *msg, void *arg)
{
        struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct phy_info_arg *phy_info = arg;

        struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];

        struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
        static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
                = {
                [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
                [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
                [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
                [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
                [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
        };

        struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
        static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
                [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
                [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
                { .type = NLA_FLAG },
        };

        struct nlattr *nl_band;
        struct nlattr *nl_freq;
        struct nlattr *nl_rate;
        int rem_band, rem_freq, rem_rate;
        struct wpa_hw_modes *mode;
        int idx, mode_is_set;

        nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);

        if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
                return NL_SKIP;

        nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
                            rem_band) {
                mode = os_realloc(phy_info->modes,
                                  (*phy_info->num_modes + 1) * sizeof(*mode));
                if (!mode)
                        return NL_SKIP;
                phy_info->modes = mode;

                mode_is_set = 0;

                mode = &phy_info->modes[*(phy_info->num_modes)];
                os_memset(mode, 0, sizeof(*mode));
                *(phy_info->num_modes) += 1;

                nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
                          nla_len(nl_band), NULL);

                nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
                                    rem_freq) {
                        nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
                                  nla_data(nl_freq), nla_len(nl_freq),
                                  freq_policy);
                        if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
                                continue;
                        mode->num_channels++;
                }

                mode->channels = os_zalloc(mode->num_channels *
                                           sizeof(struct wpa_channel_data));
                if (!mode->channels)
                        return NL_SKIP;

                idx = 0;

                nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
                                    rem_freq) {
                        nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
                                  nla_data(nl_freq), nla_len(nl_freq),
                                  freq_policy);
                        if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
                                continue;

                        mode->channels[idx].freq = nla_get_u32(
                                tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
                        mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
                                WPA_CHAN_W_ACTIVE_SCAN |
                                WPA_CHAN_W_IBSS;

                        if (!mode_is_set) {
                                /* crude heuristic */
                                if (mode->channels[idx].freq < 4000)
                                        mode->mode = WPA_MODE_IEEE80211B;
                                else
                                        mode->mode = WPA_MODE_IEEE80211A;
                                mode_is_set = 1;
                        }

                        /* crude heuristic */
                        if (mode->channels[idx].freq < 4000) {
                                if (mode->channels[idx].freq == 2484)
                                        mode->channels[idx].chan = 14;
                                else
                                        mode->channels[idx].chan =
                                                (mode->channels[idx].freq -
                                                 2407) / 5;
                        } else
                                mode->channels[idx].chan =
                                        mode->channels[idx].freq / 5 - 1000;

                        if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
                                mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
                        if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
                                mode->channels[idx].flag &=
                                        ~WPA_CHAN_W_ACTIVE_SCAN;
                        if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
                                mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
                        idx++;
                }

                nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
                                    rem_rate) {
                        nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
                                  nla_data(nl_rate), nla_len(nl_rate),
                                  rate_policy);
                        if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
                                continue;
                        mode->num_rates++;
                }

                mode->rates = os_zalloc(mode->num_rates *
                                        sizeof(struct wpa_rate_data));
                if (!mode->rates)
                        return NL_SKIP;

                idx = 0;

                nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
                                    rem_rate) {
                        nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
                                  nla_data(nl_rate), nla_len(nl_rate),
                                  rate_policy);
                        if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
                                continue;
                        mode->rates[idx].rate = nla_get_u32(
                                tb_rate[NL80211_BITRATE_ATTR_RATE]);

                        /* crude heuristic */
                        if (mode->mode == WPA_MODE_IEEE80211B &&
                            mode->rates[idx].rate > 200)
                                mode->mode = WPA_MODE_IEEE80211G;

                        if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
                                mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;

                        idx++;
                }
        }

        return NL_SKIP;
}


static struct wpa_hw_modes *
wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct nl_msg *msg;
        struct phy_info_arg result = {
                .num_modes = num_modes,
                .modes = NULL,
        };

        *num_modes = 0;
        *flags = 0;

        msg = nlmsg_alloc();
        if (!msg)
                return NULL;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                    0, NL80211_CMD_GET_WIPHY, 0);

        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

        if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
                return result.modes;
nla_put_failure:
        return NULL;
}


static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
                                          int chan, int freq)
{
        return wpa_driver_nl80211_set_freq(priv, freq);
}


static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
                                        size_t data_len)
{
        struct wpa_driver_nl80211_data *drv = priv;
        __u8 rtap_hdr[] = {
                0x00, 0x00, /* radiotap version */
                0x0e, 0x00, /* radiotap length */
                0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
                0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
                0x00,       /* padding */
                0x00, 0x00, /* RX and TX flags to indicate that */
                0x00, 0x00, /* this is the injected frame directly */
        };
        struct iovec iov[2] = {
                {
                        .iov_base = &rtap_hdr,
                        .iov_len = sizeof(rtap_hdr),
                },
                {
                        .iov_base = (void *) data,
                        .iov_len = data_len,
                }
        };
        struct msghdr msg = {
                .msg_name = NULL,
                .msg_namelen = 0,
                .msg_iov = iov,
                .msg_iovlen = 2,
                .msg_control = NULL,
                .msg_controllen = 0,
                .msg_flags = 0,
        };

        if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
                perror("send[MLME]");
                return -1;
        }

        return 0;
}


static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
                                           const u8 *supp_rates,
                                           size_t supp_rates_len)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct nl_msg *msg;
        int ret = -1;

        msg = nlmsg_alloc();
        if (!msg)
                return -ENOMEM;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                    0, NL80211_CMD_NEW_STATION, 0);

        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
        NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
        /* TODO: Get proper Association ID and listen interval */
        NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
        NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
                supp_rates);
        NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        /* ignore EEXIST, this happens if a STA associates while associated */
        if (ret == -EEXIST || ret >= 0)
                ret = 0;

nla_put_failure:
        return ret;
}


static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
{
        struct wpa_driver_nl80211_data *drv = priv;
        struct nl_msg *msg;
        int ret = -1;

        msg = nlmsg_alloc();
        if (!msg)
                return -ENOMEM;

        genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
                    0, NL80211_CMD_DEL_STATION, 0);

        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
        NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);

        ret = 0;

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        return ret;

nla_put_failure:
        return -ENOBUFS;
}

#endif /* CONFIG_CLIENT_MLME */


const struct wpa_driver_ops wpa_driver_nl80211_ops = {
        .name = "nl80211",
        .desc = "Linux nl80211/cfg80211",
        .get_bssid = wpa_driver_nl80211_get_bssid,
        .get_ssid = wpa_driver_nl80211_get_ssid,
        .set_wpa = wpa_driver_nl80211_set_wpa,
        .set_key = wpa_driver_nl80211_set_key,
        .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
        .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
        .scan = wpa_driver_nl80211_scan,
        .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
        .deauthenticate = wpa_driver_nl80211_deauthenticate,
        .disassociate = wpa_driver_nl80211_disassociate,
        .set_mode = wpa_driver_nl80211_set_mode,
        .associate = wpa_driver_nl80211_associate,
        .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
        .init = wpa_driver_nl80211_init,
        .deinit = wpa_driver_nl80211_deinit,
        .set_param = wpa_driver_nl80211_set_param,
        .add_pmkid = wpa_driver_nl80211_add_pmkid,
        .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
        .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
        .get_capa = wpa_driver_nl80211_get_capa,
        .set_operstate = wpa_driver_nl80211_set_operstate,
        .set_country = wpa_driver_nl80211_set_country,
        .set_probe_req_ie = wpa_driver_nl80211_set_probe_req_ie,
#ifdef CONFIG_CLIENT_MLME
        .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
        .set_channel = wpa_driver_nl80211_set_channel,
        .set_ssid = wpa_driver_nl80211_set_ssid,
        .set_bssid = wpa_driver_nl80211_set_bssid,
        .send_mlme = wpa_driver_nl80211_send_mlme,
        .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
        .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
#endif /* CONFIG_CLIENT_MLME */
};
